<template>
  <div class='list' ref='wrapper'>
    <div>
      <div class='area'>
        <div class='title border-topbottom'>当前城市</div>
        <div class='button-list'>
          <div class='button-wrapper'>
            <div class='button'>{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class='area'>
        <div class='title border-topbottom'>热门城市</div>
        <div class='button-list'>
          <div
            class='button-wrapper'
            v-for='item of hotCities'
            :key='item.id'
            @click='handleCityClick(item.name)'
          >
            <div class='button'>{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class='area'
        v-for='(item,key) of cities'
        :key='key'
        :ref='key'>
        <div class='title border-topbottom' >{{key}}</div>
        <div class='item-list'>
          <div
            class='item border-bottom'
            v-for='innerItem of item'
            :key='innerItem.id'
            @click='handleCityClick(innerItem.name)'
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  }
}
</script>

<style lang='stylus' scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
        border-color: #ccc
    &:after
        border-color: #ccc
   .border-bottom
    &:before
        border-color: #ccc
   .list
     overflow: hidden
     position: absolute
     top: 1.58rem
     left: 0
     right: 0
     bottom: 0
  .title
    line-height: .54rem
    background: #eee
    padding-left: .2rem
    color: #666
  .button-list
    overflow: hidden
    padding: .1rem .6rem .1rem .1rem
    .button-wrapper
      float: left
      width: 33.33%
      .button
        margin: .1rem;
        padding: .1rem 0
        text-align: center
        border: .02rem solid #ccc
        border-radius: .06rem 3px
  .item-list
    .item
      line-height: .76rem
      padding-left: .2rem
</style>
